lost_card
Lost card. The card has been reported lost and is permanently blocked.
Will retrying the charge work?
No. The same card will keep failing. You need the customer to give you a new payment method.
What to do about it
Never retry this card. Ask the customer for a new one. Don't mention the 'lost' status in your email; just ask for an update.
What to tell your customer
The payment was declined. Update your card details to continue.